According to Dutch News, the conflict in Syria has become a catalyst for radical Muslims in the Netherlands, with messages becoming more explicit and widespread, the Dutch security service AIVD said on Monday.

Radical texts spoken by young preachers and social media are leading to jihadist propaganda being spread more quickly, leading to 'further radicalization on a wider scale,' the AIVD said in a new report.

The Dutch authorities estimate 130 Dutch citizens, including 20 girls and young women, have so far left to fight in Syria's civil war and around 80 are there at present.

Some 30 have returned to the Netherlands and 14 have been killed. Last week, police stopped a 15-year-old girl from travelling to Syria via Germany after a tip-off.